webpack.config.js

const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  entry: "./client/index.js",
  mode: "development",
  output: {
    path: path.join(__dirname, "/build"),
    filename: "bundle.js",
    publicPath: "/",
  },
  module: {
    rules: [
      {
        test: /\.jsx?/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env", "@babel/preset-react"],
          },
        },
      },
      {
        test: /\.css$/i,
        exclude: /node_modules/,
        include: path.resolve(__dirname, "client"),
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
  devServer: {
    static: {
      publicPath: "/build/",
    },
    historyApiFallback: true,
    port: 8080,
    proxy: {
      "/api": "http://localhost:3000",
    },
  },

  plugins: [
    new HtmlWebpackPlugin({
      template: "./index.html",
    }),
    new MiniCssExtractPlugin({
      filename: "styles.css",
      chunkFilename: "styles.css",
    }),
  ],
};